This is a deleted scene from Star Wars Episode VII of Chewbacca ripping off the arm of the Jakku junk boss Unkar Plutt. It does seem a little out of place, but as Hedonistica pointed out, it would have brought some credibility to the scene from A New Hope where Han tells C-3PO that R2-D2 should let Chewbacca win the holographic game of Dejarik they're playing because Wookies are known to pull people's arms out of their sockets when they lose. I remember I got in a fight once and tried to rip the dude's arm off but only managed to pop a couple of his knuckles. Then, you know, I got punched in the face a lot. My poor nose. I can smell my ear.
Keep going for the deleted scene, as well as the Dejarik scene from A New Hope for reference.